Sürücü koltuğu simülatörü mekanik ve tahrik sistemi tasarımı

06.03.2018 tarihli ve 30352 sayılı Resmi Gazetede yayımlanan “Yükseköğretim Kanunu İle Bazı Kanun Ve Kanun Hükmünde Kararnamelerde Değişiklik Yapılması Hakkında Kanun” ile 18.06.2018 tarihli “Lisansüstü Tezlerin Elektronik Ortamda Toplanması, Düzenlenmesi ve Erişime Açılmasına İlişkin Yönerge” gereğince tam metin erişime açılmıştır.Simülatörler özellikle gerçek sistem üzerinde denenmesi tehlikeli veya imkansız olan eğitim konuları için ya da halihazırda olmayan sistemlerin davranışlarının gözlenmesi ve incelenmesi için kullanılır. Araç sürücü koltuğu simülatörü yapılması, başta sürücü kurslarında verilen pratik eğitimin daha ekonomik, verimli ve güvenli bir şekilde yapılmasını sağlar. Aynı zamanda çevresel etkileri de azaltacaktır. Bu doğrultuda tasarlanması planlanan sistem için önce literatür araştırması yapılmıştır. Simülatör; üç ayrı bölümden meydana gelecek şekilde tasarlanmıştır. Bu bölümler; Mekanik, Elektronik-Kontrol ve Tahrik Sistemidir. Tasarım öncesinde insanın anatomik özellikleri düşünülerek mekanik sistemin boyutlandırılması yapılmıştır. Mekanik sistem uygun bir zemine yerleştirilecek ve üç boyutlu sanal olarak tasarlanmış sürüş güzergahına uygun hareketler yapacak şekilde Elektronik-Kontrol ve Tahrik sistemleri projelendirilecektir. Burada iki farklı tahrik sistemi kullanılacaktır. Birincisinde mekanik sistemin tahriki hidrolik sistem, ikincisinde ise elektromekanik sistem tarafından sağlanacaktır. Bu iki farklı tahrik sisteminin simülatöre uygulanması, ekonomikliği ve verimliliği karşılaştırılacaktır.Simulators are especially used on educational subjects which are too dangerous or impossible to try on the real system or the observation and examination of unprepared systems' behaviors. The production of the Driver's Seat Simulator provides a more economical, more efficient and safer version of the practice lessons given at the driving schools. In this direction, first, literature research was made for the system planned for designing. The simulator was designed to be formed by 3 separate parts. These parts are Mechanic, Electronic-Control and Propulsion Systems. Before the designing the size of the system was calibrated by considering the anatomic structure of the human body. The Mechanical System will be placed in a proper base, the Electronic-Control and the Propulsion System will be projected with the ability to move appropriately to the 3 dimensional virtually designed driveway. There will be 2 different Propulsion Systems used in this set-up. At the first one the propulsion will be provided by the propulsionary hydraulic system of the mechanical system and at the second one the propulsion will be provided by the electromechanical system. The application of these two different propulsion systems will compare the productivity and the affordability

4-bit SiGe phase shifter using distributed active switches and variable gain amplifier for x-band phased array applications

This paper presents a 4-bit digitally controlled phase shifter for X-band (8-12.5 GHz) phased-arrays, implemented in 0.25-mu m SiGe BiCMOS process. Distributed active switches are utilized in first three bits. On-chip inductances are used to provide 22.5 degrees phase shift steps. The placement and the geometry of these inductances are optimized for minimum phase error and insertion loss. In order to compensate the gain variations of this stage, a single stage variable gain amplifier is used. The fourth bit which provides 0/180 degrees phase shift is obtained in third amplification stage, with switching between common base - common emitter configuration. With utilization of this technique overall phase error is significantly decreased and overall gain is increased. The phase shifter achieves 7dB gain with 3 dB of gain error. 360 degrees phase shift is achieved in 4 bit resolution with a phase error of 0.5 degrees at center frequency of 10GHz, and maximum 22 degrees phase error in 4.5 GHz bandwidth. The chip size is 2150 mu m x 1040 mu m including the bondpads. These performance parameters are comparable with the state of the art using similar technology

Fingolimod induced fulminant liver failure requiring liver transplantation: A case report

Fingolimod has been used for about ten years to treat multiple recurrent sclerosis. It has been reported that Fingolimod causes an elevation in liver enzymes. In this case report, the clinical and laboratory parameters improved after discontinuation of the drug. However, there is no publication in the literature regarding acute liver failure and liver transplantation following Fingolimod treatment. In this article, we presented a 33 – year – old female patient who developed acute liver failure and underwent liver transplantation after Fingolimod treatment for recurrent multiple sclerosis

Tie-in configuration applications in the fractures of extremity long bones in cat

Bu çalışmada, kedilerde karşılaşılan ekstremite uzun kemiklerinin kırıklarında klinik olgularda endike olduğu durumlarda Tie-in konfigürasyonunun sağaltım uygulamaları ile sonuçlarının klinik ve radyolojik değerlendirmelerinin yapılması ve aktarılması amaçlanmıştır. Çalışma materyalini ön veya arka ekstremitelerini kullanamama şikâyeti ile getirilen, klinik ve radyografik muayeneler sonucunda ekstremite uzun kemiklerinde kırık belirlenen değişik ırk, yaş ve cinsiyetteki toplam 23 kedi oluşturdu. Akrilik ile modifiye Tie-in konfigürasyonu 2 humerus, 15 femur, 4 tibia, 1 femur ile tibia ve 1 humerus ile femur’da belirlenen kırıkların (toplam; 3 humerus, 17 femur, 5 tibia) sağaltımında uygulanmıştır. Postoperatif dönemde, olguların 10, 21, 30 ve 45. günlerinde klinik ve radyografik kontrolleri yapıldı. Modifiye Tie-in eksternal fiksatör apareyi 45-60. günlerde uzaklaştırıldı. İzlenen olgulardan 22 olguda herhangi bir sorun olmaksızın iyileşme sağlanırken, 1 olguda da operasyon bölgesinde gelişen enfeksiyon nedeniyle klinik fonksiyonel iyileşme sağlanamadı. Tie-in konfigürasyon yönteminin kedilerde ekstremite uzun kemik kırıklarında kırık fragmentlerinin redüksiyonu sonrasında stabilizasyonunu sağlamada uygun olduğu ve kırık sağaltımının başarıyla sonuçlandırabileceği belirlenmiştir.The aim of this study to compare clinical examination and radiographical evaluations of Tie-in configurations in clinical cases which is indicated and results of cats long extremity fractures. The study material consisted of 23 cats of different breed, age and gender, who were fractured in extremity long bones as a result of clinical and radiographic examinations brought with the complaint of not being able to use the front or hind limbs. The tie-in configuration was applied in 2 humerus, 15 femur, 4 tibia, 1 femur and tibia and 1 humerus and femur fractures (total; 3 humerus, 17 femur, 5 tibia). Postoperative 10,21,30,45th days clinical and radiographical examinations of cases performed. Modified Tie-in external fixator removed at 45-60th days after the operation. Followed up 22 cases recovered without any problems and one case did not result in functional recovery after infection of the operation site. In conclusion, it was declined that the Tie-in configuration method is succesful to stabilize the fracture line of long bone fractures during reduction of fracture bone fragments in the cats

Does preparation for childbirth training reduce the cesarean rate?

Purpose: This study was conducted as experimental and prospective to determine the effect of birth preparation training on the birth route preparations of pregnant individuals. Methods: The study was conducted in three state hospitals which operate under Kocaeli State Hospitals Community. The study group included 110 pregnant individuals who attended the hospitals’ birth preparation training classes between 1 January – 30 June 2015 and the control group included 90 pregnant individuals from Kocaeli Maternity Hospital. The chi-squared test was used to measure the differences between groups in classified variables, and the t-test was used for parametric variables. P <0.05 was considered to be significant A survey form was used to identify individual demographic information, obstetric stories, and preferred birth route in order to collect relevant data. Findings: The survey reveals that 67% of the pregnant individuals prefer vaginal birth while 33% prefer cesarean birth. In choosing the birth route, 60% of the pregnant individuals make their own decisions, while 28.2% make the decision together with their partner, and 11.8% report the decision being made by their doctor. It is observed that—after attending the birth training—all of the individuals preferred vaginal birth. For the pregnant individuals, their birth route choices before and after the birth preparation training had been observed as highly statistically significant ( p<0, 005). However, when the choices of the pregnant individuals who participated in birth preparation training is compared to the control group’s choices, no statistical significance was found. Rates of cesarean were alike for both groups. Conclusions and Suggestions: In this study, for the individuals who participate in birth preparation training, the choice of the birth route is found to be affected by age, literacy, and former birth route experienced. However, no significant evidence was found regarding reducing the choice of cesarean. A pregnant individual’s birth route choice will be more healthy as she becomes qualified for, and receives sufficient treatment between the preconception stage to after birth, alternative birth routes, and consultancy for overcoming birth pain and relaxation methods

Figure 1: Simple block diagram of a SiGe BiCMOS On chip T/R module 4-Bit SiGe Phase Shifter using Distributed Active Switches and Variable Gain Amplifier For X-Band Phased Array Applications

Abstract-This paper presents a 4-bit digitally controlled phase shifter for X-band (8-12.5 GHz) phased-arrays, implemented in 0.25-µm SiGe BiCMOS process. Distributed active switches are utilized in first three bits. On-chip inductances are used to provide 22.5° phase shift steps. The placement and the geometry of these inductances are optimized for minimum phase error and insertion loss. In order to compensate the gain variations of this stage, a single stage variable gain amplifier is used. The fourth bit which provides 0/180° phase shift is obtained in third amplification stage, with switching between common basecommon emitter configuration. With utilization of this technique overall phase error is significantly decreased and overall gain is increased. The phase shifter achieves 7dB gain with 3 dB of gain error. 360° phase shift is achieved in 4 bit resolution with a phase error of 0.5° at center frequency of 10GHz, and maximum 22° phase error in 4.5 GHz bandwidth. The chip size is 2150 µm x 1040 µm including the bondpads. These performance parameters are comparable with the state of the art using similar technology

Duloxetine alleviates high light-induced anxiety-related behaviors in Wistar rats

Purpose: To investigate the effect of subchronic duloxetine treatment on high light-induced anxietyrelated behaviors in Wistar rats. Methods: Adult male Wistar rats (n = 30) were randomly assigned to three groups of rats (10 rats/group): control group, 30 mg/kg duloxetine group, and 60 mg/kg duloxetine group. Intraperitoneal injection of duloxetine was given once a day for ten days. The anxiolytic effect of duloxetine in the rats was assessed using light/dark box (LDB) anxiety test. Results: Anxiety-related behaviors were significantly reduced in duloxetine-treated rats, when compared with control group. The reductions were not dose-dependent (light zone time and latency time were significantly increased, while dark zone time decreased significantly, p &lt; 0.05). The number of rearings significantly increased in 30 mg/kg duloxetine group, relative to control and 60 mg/kg duloxetine groups (p &lt; 0.05). However, there were no significant differences in the number of light-todark entrances among the groups (p &gt; 0.05). Conclusion: These results show that subchronic treatment with duloxetine alleviates anxiety-related behaviors in Wistar rats

Mortality Related Risk Factors in High-Risk Pulmonary Embolism in the ICU

Introduction. We sought to identify possible risk factors associated with mortality in patients with high-risk pulmonary embolism (PE) after intensive care unit (ICU) admission. Patients and Methods. PE patients, diagnosed with computer tomography pulmonary angiography, were included from two ICUs and were categorized into groups: group 1 high-risk patients and group 2 intermediate/low-risk patients. Results. Fifty-six patients were included. Of them, 41 (73.2%) were group 1 and 15 (26.7%) were group 2. When compared to group 2, need for vasopressor therapy (0 vs 68.3%; p18 (OR 42.47 95% CI 1.50–1201.1), invasive mechanical ventilation (OR 30.10 95% CI 1.96–463.31), and thrombolytic therapy (OR 0.03 95% CI 0.01–0.98) were found as independent predictors of mortality. Conclusion. In high-risk PE, admission APACHE II score and need for invasive mechanical ventilation may predict death in ICU. Thrombolytic therapy seems to be beneficial in these patients

A wideband high isolation CMOS T/R switch for x-band phased array radar systems

This paper presents an SPDT switch which is designed to operate at 8-12 GHz frequency range (X-Band), as a sub module of the front end circuit of a phased array radar. The switch distinguishes itself from its counterparts with its larger frequency range and higher isolation that is uniformly distributed over its bandwidth. It is fabricated using 0.25 mu m SiGe BiCMOS technology of IHP Microelectronics (Germany). As a new technique, shunt inductors are placed next to shunt transistors in order to improve trade-off between insertion loss and isolation. It has isolation higher than 30 dB in entire band, input referred 1dB compression point is 27.6 dBm, insertion loss is between 2.7-4.1 dB, input and output referred return losses are better than 11 dB in the frequency range of 8-12 Gliz